<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
      .container{
          max-width: 1000px;
          margin: 0 auto;
      }
        .header{
            height: 100px;
            background-color: #7a43b6;
        }
        .content{
            height: 400px;
            background-color: yellow;
        }
        .footer{
            height: 100px;
            background-color: #5cb85c;
        }
    </style>
</head>
<body>
<div class="container">
<div class="header"></div>
<div class="content"></div>
<div class="footer"></div>
</div>
</body>
</html>